/Engine/Plugins/Importers/USDImporter/Source/USDTests/Public/USDTestsBlueprintLibrary.h
Queries a subtree vertex count using the stage actor's info cache, which is not yet exposed to blueprint. May return -1 in case of an error.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Counts") static int64 GetSubtreeVertexCount ( [AUsdStageActor](API\Plugins\USDStage\AUsdStageActor) * StageActor, const [FString](API\Runtime\Core\Containers\FString) & PrimPath )